单项选择题

The passage is mainly concerned with ______.

A．application of analogy in studying juvenile delinquency
B．a research design concerning juvenile delinquency
C．significance of juvenile delinquency
D．an extensive survey of researches in juvenile delinquency

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单项选择题

The word project (Line 2, Para.4) refers to ______.

A．a comprehensive study of juvenile delinquency
B．a full exploration of research designs
C．an extensive research on crime
D．a further investigation into new research techniques

单项选择题

In the first paragraph, the author draws an analogy between ______.

A．doing research and drawing a picture
B．research finding and picture's perspective
C．designing a research and making a quick drawing
D．a researcher and a painter